Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression.
ngx_brotli is a set of two nginx modules:
- ngx_brotli filter module - used to compress responses on-the-fly,
- ngx_brotli static module - used to serve pre-compressed files.
Both Brotli library and nginx module are under active development.
yum install https://extras.getpagespeed.com/release-el7-latest.rpm
yum install nginx nginx-module-nbr
Follow installation package prompts to enable the dynamic Brotli modules in nginx.conf:
load_module modules/ngx_http_brotli_filter_module.so;
load_module modules/ngx_http_brotli_static_module.so;
$ cd nginx-1.x.x
$ ./configure --add-module=/path/to/ngx_brotli
$ make && make install
- syntax:
brotli_static on|off|always - default:
off - context:
http,server,location
Enables or disables checking of the existence of pre-compressed files with.br
extension. With the always value, pre-compressed file is used in all cases,
without checking if the client supports it.
- syntax:
brotli on|off - default:
off - context:
http,server,location,if
Enables or disables on-the-fly compression of responses.
- syntax:
brotli_types <mime_type> [..] - default:
text/html - context:
http,server,location
Enables on-the-fly compression of responses for the specified MIME types
in addition to text/html. The special value * matches any MIME type.
Responses with the text/html MIME type are always compressed.
- syntax:
brotli_buffers <number> <size> - default:
32 4k|16 8k - context:
http,server,location
Deprecated, ignored.
- syntax:
brotli_comp_level <level> - default:
6 - context:
http,server,location
Sets Brotli quality (compression) level.
Acceptable values are in the range from 0 to 11.
- syntax:
brotli_window <size> - default:
512k - context:
http,server,location
Sets Brotli window size. Acceptable values are 1k, 2k, 4k, 8k, 16k,
32k, 64k, 128k, 256k, 512k, 1m, 2m, 4m, 8m and 16m.
- syntax:
brotli_min_length <length> - default:
20 - context:
http,server,location
Sets the minimum length of a response that will be compressed.
The length is determined only from the Content-Length response header field.
Achieved compression ratio, computed as the ratio between the original and compressed response sizes.
See Contributing.
Copyright (C) 2002-2015 Igor Sysoev
Copyright (C) 2011-2015 Nginx, Inc.
Copyright (C) 2015 Google Inc.
All rights reserved.
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modification, are permitted provided that the following conditions
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